released on Oct 10, 2007

Waking up in a seemingly empty laboratory, the player is made to complete various physics-based puzzle challenges through numerous test chambers in order to test out the new Aperture Science Handheld Portal Device, without an explanation as to how, why or by whom.

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sweet game! i would have rated it higher, if i didn't beat portal 2 before making this review.

For a 2007 game, this title aged incredibly well. Great atmosphere, great puzzles, great replay value.
It really does feel like a tech demo when you step back and look at it, although that's necessarily a bad thing.

Classic puzzler with well designed puzzles with a well written story backing the whole thing up. I'd recommend this to anyone.